Ball-cock.



Patented July l, i902.

A. W. MURRAY.

BALL COCK.

(Application ledleb. 14, 1901.)

(No Model.)

Illlllulmnum /7 w: Noam; persas co, PHoYoumo., wAsmNmoN. n. c.

UNrrs STATES ATnNr trice.

ALEXANDER IVILCOXSON MURRAY, OF CHICAGO, ILLINOIS.

BALLn-COCK.

SPECIFICATION forming part of Letters Patent'No. 703,805, dated July 1,1902.

Application filed Februarylll, 1901. Serial No. 47,260. (No model.)

To a/ZZ whom, it' may concern.-

Be it known that I, ALEXANDER WILooX- son MURRAY, a Citizen 0f theUnited states,

residing at Chicago, inthe county of Cook, State of Illinois, haveinvented certain new and useful Improvements in Ball-Cocks; and I dohereby declare the following to be a full,I clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the sam e.

This invention relates to float-valves such as are used in connectionwith the iiushingtanks of water-closets and in similar places; and theobject of the invention is to provide a simple and efficientconstruction wherein when the outlet of the tank is opened and the waterescapes the float will drop to open the valve for the supply-pipeandivhen the tank has been iilled to a predetermined height the `floatwill operate to close the valve, and thus cut oft the water-supply.

A further object of the invention is to provide a construction whereinthe main valve will be operated by hydrostatic pressure, controlled by asupplemental valve, which is in turn operated by the float.

An additional object of the invention is to provide for such delicatebalance of the parts as will insure an efficient operation thereof,other objects and advantages of the invention being evident from thefollowing description. v

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figure l isa sectional view showing a portion of a tank equipped withthe present valve, the valve being shown in closed position. Fig. 2 is aview similar to Fig. l and showing the valve in open position. Fig. 3 isa section on line 3 3 of Fig. l. Fig. et is a perspective view of thetwo washers.

Referring now to the drawings, 5 represents a tank equipped with acommon form of Hush-pipe having the usual tubular closure 6,attached toan operating-lever, through the medium of which it is raised from itsseatto permit of flushing and is lowered to return to its seat, thisapparatus forming no part of the present invention and being well knownto those skilled in the art. Disposed within the tank and having itslower end passed through the bottom thereof lis a standpipe 7, which hasthe usual supply-pipe 8 connected with its lower end, and upon the upperend of this stand-pipe and within the tank is disposed the lioat-valveof the present invention. The valve includes a casing, cornprising a capl0 of annular form and having a central threaded opening` l1, throughthe medium of which said cap is screwed upon the upper end of thestand-pipe, and engaged with the peripheral threads l2 of the cap is thehollow body 13 of the casing, which incloses the valve-chamber. Thevalve-chamber includes a lower enlarged portion 14 and an uppercontracted portion 15, resulting in the formation of a shoulder 16, andin the lower portion of thc valve-chamber and between the upper faceofthe cap 10 and the shoulder 16 therev is disposed a disk-shaped valveI7, having a central perforation 1S for the purpose hereinafterdescribed, this valve being, in effect, a washer. The valve 17 has aslight vertical play between theupper face of the head and theshonlderand in its normal position rests uponthehead and closes an annularseriesof ports 19, which are formed through the head'and which convergedownwardly, so asito discharge against the standpipe below the head. Toinsure this discharge, a flange 20 depends from the head exterior to theline of the ports, and the water is thus prevented from making the noisethat is incident to the usual discharge into the body of water in thetank. Upon the valve 17 is disposed awasher 22, of metal or othermaterial of greaterY specic gravity than the liquid to be controlled,and which washer acts washer against the top of the casing when` theyare suddenly raised and also serves the purpose of preventing poundingin the service-pipes when the water is cut off suddenly at a spigot.Upon the upper end of the tubular extension 23 is disposed a cap 25, in

\ to press it to its seat and is operated by a float 29, fixed to theopposite end of the lever. In order that the iioat may be required toovercome only the resistance of the cap to movement and no dead-weight,a counterbalance 30 in the form of a Weight is screwed onto the threadedend of the lever opposite to the iioat thereof, and this Weight is.adjusted so that the lever will balance evenly. With this constructionit will be seen that when the tank is full the iioat is raised and thecap 25 is held down .against the extension 23 to close it. The pressureof water in the standpipe against the under side of the valve is thenequalized by the downward pressure of an equal Column of water above thevalve; but the upper surface of the valve exposed to pressure' isgreaterthan thelower surface 'exposed to pressure, and hence the Washer Will beheld irmly against the upper face of the head to cover the portstherethrough and prevent egress of water. If now the tank be emptied ora sufoient amount of Water be drawn therefrom to cause the iioat todrop, the end of the ioat-lever will be raised from the cap, when thehydrostatic pressure within the valve-casing will raise the cap from theextension 23 and water will iiow through said extension. This iiow ofwater through the extension will of course reduce the pressure upon thetop 0f the valve practically to zero, While the pressure on that,portion of the valve projecting over the upper end of the stand-pipewill be sufficient to raise the valve from its seat and expose the portsthrough the head or cap lO, when the Water from the standpipe will bedischarged from said ports and against the outer face of the stand-pipein the manner above described. As soon as the Water in the tank reachesthat level where the lever is moved to rengage the cap and move it toits seatthe hydrostatic pressure on the upper face of the valve willagain become in excess of the pressure on that portion of the lower sidethat projects over the stand-pipe and the valve will be forceddownwardly to close the ports-` It will be understood that in practicethe central opening through the valve may be varied in diameter tocorrespond to dierent pressures in .the ysupply-pipe and differentspeciiic gravities of liquids to be controlled and that variousmodifications of the specific construction shown may be made andanysuit-v able materials and proportions may be usedwithout departingvention.

What is claimed is- In a device of the class described, the combinationof an inlet-pipe having a threaded upper end, the cylindrical cap havinga centrall threaded perforation into which the pipe is screwed, saidpipe having an annular series of perforations surrounding the centralperforation and having its outer face threaded, the hollow cylindricalbody screwed upon the cap, said body being reduced in interior diameterto form shoulders, the disk-shaped valve disposed between the shouldersand the cap and covering the annular series of perforations, said valvehaving a central perforation communicating with and of lesser diameterthan the pipe, the ring disposed befrom the spirit of the intween thetop of the cylindrical body and the Washer and resting loosely uponthelatter, the reduced tubular extension over the top of the body portionand communicating with the interior thereof, and the ioat-lever pivotedupon the upper end of the body and Y having a valve disposed to restupon the upper end of the tubular extension to close it. In testimonywhereof I hereunto sign my name, in the presence of two subscribing Witnesses, on the 2d day of January, 1901.

ALEXANDER WILCOXSON MURRAY. Witnesses:

JOHN SALMON, WALTER B. CREIGHTON.

